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The Q-Amp™ is a trans-impedance preamplifier designed primarily for use with MicroAcoustic's BAT™ transducers. The amplifier exhibits ultra-low noise performance and extremely high gain in a small well-shielded enclosure. A switch-selectable high-pass filter allows reduction of output energy at audio and near-ultrasonic frequencies, while an attenuator circuit can be activated in cases where the input signal from the transducer is too high. The high-voltage polarizing supply can be switch-activated for use with capacitive-type transducers, or can be deactivated for use with piezoelectric-type transducers. The unit is powered from a small wall-mount ac adapter which ships standard with the unit.

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Specifications:

• sensitivity: 950mV/pC nominal (or ~ 0.14 µV/electron)
• bandwidth: <10kHz to >5MHz (for Ct ~ 600pF)
• polarizing voltage: safely applied & removed from transducers
• transducer input: >530 kΩ above 10kHz, SMB-type socket
• input attenuator: -12dB (nominal) in a single-step
• output: 50Ω impedance, BNC-type socket, line-driver allows for long output cable-lengths
• HP filter (output): -40dB/decade, cut-off frequency fc ~ 40kHz
• input power: 12VAC, 1A wall-adapter
• dimensions: 110mm by 30mm by 60mm

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